Where my y-pipe connects to my pipe on my 2010 M8, I have a lot of exhaust leakage. What are guys using to seal up that donut in there? High temp silicon?
Yes,high temp silicone (the copper stuff from Cdn Tire) works. I find that it doesn't last forever though. On any sled I had to use it on I had to re-apply a couple of times a year.
If you're finding the silicone doesn't work, you might have to replace the donut and see if you can get a better seal.